What issues can i face during placements due to low CGPA in undergrad?

Do guys with below 5.5 CG in undergrad face problems during summers and placements?
Kindly answer on these parameters
1) What %age of the companies visiting have such a criterion?
2) Could you please name some good companies visiting the campus which do not have this minimum eligibility?
3)I heard all of the finance companies need a min 6 CG. Is this true?